Add single log-out integration about drupalauth HOT 9 OPEN

Which authentication source are you using? (UserPass.php or External.php)
Which version of Drupal? (6 or 7)

External.php, Drupal 7. Thanks for the quick reply!

(Is there an IRC channel for SSP? :))

I suspect the issue is with the WordPress integration. Here's what I would do 
to test it:
1) Go to the SimpleSAMLphp SP installation page (the one for WordPress)
2) Under the Authentication Tab, click "Test configured authentication sources"
3) Click on the SP (default-sp?) that is connected to the the IdP that uses 
drupalauth
4) When presented with the Drupal login page, login
5) Return to the Drupal site and logout of Drupal
6) Repeat steps 2 and 3, if you are presented with the Drupal login page then 
drupalauth and the two instances of SimpleSAMLphp are working fine, it's the 
WordPress plugin

Oh, I have actually already done that I realized. What I am really asking
is how to make the plugin support it. What function should it call to ask
the SP to determine if we are logged in or not so that it can log the user
out on the next WP page load?

[deleted comment]

I'm facing the same Issue Kevin, did you solve the problem? It's possible to 
logout sp when i logout from idp?

Same here. When logging out of the drupal site after doeing steps 1 to 5, and 
wanting to do step 6, i am already logedin when pressing the SP link in step 3.

For me it is fixed. The logout link in the SimpleSAML interface was wrong it 
had:
url?as=default-sp?as=default-sp&logout
instead of:
url?as=default-sp&logout

I am using nginx, and had some more issues; the following fixes it: 
https://github.com/HTML24/WAYF/wiki/Frequent-Errors-List
public static function selfURLNoQuery() {
    $url = self::selfURL();
    $url = strtok($url, '?');
    return $url;
}

More reading: 
https://groups.google.com/forum/?fromgroups=#!topic/simplesamlphp/EERTQ5zvQsA

But doesn't SAML support logging out of SP users when IdP is logged out? It 
cannot be so that the SP application has to check the IdP on every page load if 
the user is logged in or not in IdP, major performance issues with that.

Also logging out in one SP should trigger logout on all other SPs which the IdP 
is aware of. Does this module support that? Or should the toolkit take care of 
it when it receives a logout request from any SP application?